Question

Efetue a expressão:1+{[-9+3.(3-19875÷9)°-18÷6]+13}-¹

Answer 1

1+{[-9+3.1-18:6]+13}-¹

1+{[-9+3-3]+13}-¹

1+{-9+13}-¹

1+{+4}-¹

1+1/4

4+1/4

5/4